diff --git a/SUMMARY.md b/SUMMARY.md
index 4b71116..0d0a344 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -8,7 +8,7 @@
     * [Kernel decompression](Booting/linux-bootstrap-5.md)
 * [Initialization](Initialization/README.md)
     * [First steps in kernel]()
-* [Theory]()
+* [Theory](Theory/README.md)
     * [Paging](Theory.Paging.md)
     * [Elf64](Theory/ELF.md)
 * [Misc]()